Answer:
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Explanation:
A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding. Often, physical changes can be undone, if energy is input.
Answer:
C voltage
Explanation:
Voltage is the change in electric potential so basically current flows from high potential to low potential due to voltage.
Answer: Highest point from the ground that ball reaches = 5.102
Explanation:
Formula -
v² - u² = 2as
final velocity v = 0
initial velocity u = 10m/s
acceleration a = g (gravity)=9.8
distance s = 3m+x (x is the height after 3m that object reaches)
0-(10)² = 2 (-g)*(3+x)
-100 = -2g*(3=x)
(3+x)=100/2g
3+x = 100/2*9.8 = 100/19.6 = 5.102
x=5.102-3
x=2.102
So, the highest point will be
3+x = 3+2.102
=5.102m